Automatic cutting apparatus



Feb 25, 1947 R. H. STEVENS Erm.

AUTOMATIC CUTTING APPARATUS Filed Fb. 5, 1941 12 sheets-sheet 1 diez/'11s anz T0111/ 1171749011/ Feb 25, 1947 R. H. STEVENS Erm. I 2,416,652

AUTOMATIC CUTTING APPARATUS Filed Feb. 5, 1941 l2 Sheets-Sheet 2 Ilia/aard E Skye/1s and Tom Wz'lsazl Feb. 2s, 1947. R, H STEVENS ETAL 2,416,652

AUTOMAT I C CUTTING APPARATUS Filed Feb. 5, 1941 l2 Sheets-Sheet 5 Feb. 25, 1947. R, H, STEVENS ETAL 2,416,652

AUTOMATIC CUTTING APPARATUS Filgd'Feb. 5, 1941 l2 Sheets-Sheet 4 d IY. @kai/a5* and Tam /l/zlsv.

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AUTOMATI C CUTTING APPARATUS Filed Feb. 5, 1941 l2 Sheets-Sheet 5 maar@ H. Sie-mms Feb- 25, 1947- R. H. STEVENS ETAL 2,415,652

AUTOMATIC CUTTING APPARATUS l2 Sheets-Sheet 6 IHMHHHHHHHU.

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Feb. 25, 1947. R.H. STEVENS ET AL 2,416,652

AUTOMATIC CUTTING APPARATUS Filed Feb. 5, 1941 l2 Sheets-Sheet 7 add @Mo/j.'

Feb. 25, 1947. R, H, STEVENS TAL 2,416,652

AUTOMATI C CUTTING APPARATUS Filed Feb. 5, 1941 12 sheets-sheet e 1 Feb. 25, 1947. R, H, STEVENS ETALv 2,416,652

AUTOMATIC CUTTING APPARATUS Filed Feb. 5, 1941 12 sheets-sheet 9 mzwdafszeww and T0111/ WzZs'azz/h. f

we @j/Lw@ Feb. 25, 1947. R. H. STEVENS ET AL 2,415,552

AUTOMATIC CUTTING APPARATUS I v Filed Feb. 5, 1941 l2 Sheets-Sheet lO @Seu H Nww m Feb. 25, 1947. R. H. STEVENS Erm. 2,416,652

AUTOMATIC CUTTING APPARATUS Filed Feb. 5, 1941 l2 Sheets-Sheet ll 1111/ YZO/n [fils/lll Feb. 25, 1947. A R, H STEVENS `p -l-AL 2,416,652

AUTOMATI C CUTT ING APPARATUS Filed Feb. 5, 41941 12 sheets-sheet 12 i Parenteel-'eu 2s, 1947 Vumbri-:D 'STATES 2,416,652 lfii'riazlvTf4 ortica f I This invention relates to a method and apparatus for automatically severing moving objects j such as pipes, rods and the like into predetermined Jlengths and is moreespecially designed for use with a continuous butt weld pipe mill.

In pipe mills of this type the skelp used when it comes from the rolling mill is in the form of coils. These coils are fed rapidly in succession to a machine which uncoils the skelp and stralghtens it and then it is advanced in a ribbon like form on a run out table or floor oi the mill to form a long loop. After a coil has been fed in this manner the next coil is placed in the machine for uncoiling. As this coil isfed to the run out Vtable the crop ends of the rear end for the fed coil and the forward end of the coil to be fed are cut off and the twoends welded together. From the run out table and skelp is passed through a heating furnace where the skelp is heated to a welding temperature. The skelp after issuing Afrom the heating furnace is drawn through a bell or forming rolls, then between sets of welding and sizing rolls, thence is cut into commercial lengths and passed between scale removing rolls and iinally conveyed to a cooling bed to cool.

In forming butt welded pipe in this manner the skelp and pipe' formed therefrom are advanced continuously at high speed. As an example in making 3-inch pipe the skelp and pipe formed therefrom will travel forwardv at the rate of about 125 feet a. minute, while in making It-inch pipe the travel will be over 300 feet per minute.

'The pipe is cut into comercial length just after passing between the welding and sizing rolls and it is necessary to have the saw travel at the same speed as that of the pipe during the cutting operation.

One of the oblects of our invention relates generally to apparatus for cutting into predetermined lengths continuously moving pipe and particularly to means for synchronizing the movement of a pipe severing device with the moving pipe.

Another object ci our invention relates tomeans which can be preset to indicate the travel of the pipe in feet per minute.

Another object of our invention relates tc the method of cooling the pipe at the point to be cut and then severing the pipe through the' cooled area.

Anotherv object of our invention relates to mechanism which' can be preset to automatically cut a plurality of pipe sections of uniform lengths. Another object of our .invention relates to `mechanism by means of which pipe sections of different lengths can be automatically cut.

Another object of our invention 4relates to ther I.

means for adjusting the stroke of the saw carriage. y

lAnother object of our invention relates to the 2 mechanism for automatically tilting the saw carriage. A

Other objects will appear hereinafter.

Having thus given a. general description of our invention. vwe will now in order to make the same more clear refer vto the annexed twelve sheets of drawings forming a part of this speciiication and in which like characters of referen indicate like parts: l

- application of our invention; Fig. 2 is a front elevation thereof; Fig. 3 is a detail view showing the connection between the cut timing cam and the connecting rod;

Fig.' 4 is a detail view illustratingv the manner of attaching the cam roller to thestationary portion of the gear casing;

Fig. 5-is a side elevation of the gear casing for I the carriage drive, with parts in section to show more clearly the construction; l

Fig. 6 is s, vertical'secticn through the rocking lever;

Fig. 7 is an end elevation of the saw carriage with parts broken awayand in section;

Fig. 8 is a vertical transverse section taken substantially on the line 8-8 of Fig. 2 but drawn on a, larger scale:

Fig. 9 is a'detall top plan view showing the general arrangement of the saw carriage tilting cam parts adjacent thereto;

Fig. 10 is a side elevation o! the mechanism shown in Fig. 9; l

Fig. li is a. detail view showing the manner of supporting \the movable end ci the swinging frame on which the tilting cam roller is mounted;

K Fig. 12 is a detail section illustrating the manner of operating the tilting cam roller for the Saw carriage taken on the line l2--i2 of Fig.

Fig. 13 is a vertical section through one of the spring balances and dash pot for the saw cai'- riage;

Fig. 14 is a diagram of the electrical control f Fig. 16.1s a detail view ofa device which indicates the travel of the pipe in'feet per minute:

Fig. 17 illustratesv the manner of cooling and forming dark ring marks on the pipe produced by the water or the like which is sprayed on the saw and 'then flowing over the pipe during each reciprocation of the saw carriage;

Figs. is and 19 illustrate the smooth cut made by the saw during the cutting operation through 00 the cooled area;

Figure 1 is a. top plan view illustrating in a housing adjacent thereto.

il Figs. 20 and 2l illustrate the rough'and deformed ends of the pipes which have been cut by the saw lwithout cooling the pipe 'iat this point; and

Fig. 22 is a diagram illustrating an arrangement to preset the length of pipe to be cut.

Referring now to the various characters of reference on the drawings, the numeral i indicates the mill motor, 2 the motor for adjusting the block in the rocking lever, and 3 the motor for actuating the saw carriage through reduction gearing in casing i and pinion 5 and gear wheel The shaft l for the pinion 5 is journaled in bearings d of a stationarylower portion d of the gear housing, while the gear wheel has a shaft iii iournaled in a casing il and pivoted at its lowerportion as at '2 and provided at each side of the journal bearing for shaft i@ with abutments i3 for engaging a stationary and movable stop id and iii -on the lower stationary portion s of the gear housing to limit the swinging movement o the casing li. The movable stop i5 consists of a cylindrical plunger which is mounted inv a cylindrical opening it with its outer. end enlarged and held in contact'with the abutment i3 at all times by -means of a spring il adapted to be given greater compression by means ,oi a set bolt i8 if. desired.

The outer end of shaft i@ has a cam i@ keyed thereto for engaging a cam roller 2d which is held in engagement therewith at all times by means of the spring il. The inner end of shaft id has a universal coupling 2i attached thereto for rotating the saw cut control segments 22, 2d and 2d of the limit switch which is 'mounted on top oi the casing il ior the reduction gearing.

The motor li for reciprocating the saw carriage by means of a pair of spaced rails liti for guiding` andere .55 mounted to reciprocate on traclzs in a supporting frame comprising stationary end irame members 56 which are secured to asub-base lil..

of the mill and connected together at the top and forming a track for the flanged wheeled@ attached to the upper portion of the rectangular frame 55 of the saw carriage, while the lower pofr-= tion of the rectangular frame is provided with rollers 80 having their axles disposed at an angle of 45 for engaging a square bar iii which con nects the end frame members and forms a track for supporting the saw carriage. The saw carriage is also provided with a tilting iframe @il pivoted as at @3 to the vertical sides oi the recu tangular frame 55. An arm es extends outwardly from the tilting frame di and is provided with a sleeve Sii at its outer end for supporting a shaft 66 'for a saw tl which is driven by a-motor Gli mounted on the tilting frame di through the sheaves 69 and l0 and connected by a belt'li.

In order to limit themovement of thetilting frame 62, a contact bracket l2 extends downhas-its shaft provided at one end with a D. C.

magneto generator 2d having a circuit connection 2l extending to a volt meter @il properly calibrated for indicating the said motor speed. The opposite end ci thismotor shaft is connected to reduction lgearing inthe casing d adapted to drive 'the pinion d and this end oi the shaft is also provided with la connection 2d tor driving a synchiro-tie generator il@ and a tachometer di which may be used in addition to the meter 2li for indicatingthe speed oi the motor ,d at this point.

JThe motor. for adjusting the movable bloclr in the rocking lever isv mounted ven a supporting frame d2 which is pivoted at oppositeends in standards limit switch for controlling a dial indicator 3d, while the opposite end of said motor shaft is provided with a friction brake il and a beveled gear lili adapted to mesh with a beveled gear at the lower end o the rocking lever This rochl ing lever has a hollow outer casing lli inwhich is journaled a plain spindle l with a beveled gear di? secured to its lower end meshing with beveled gear Sii and a beveled gear lll keyed to its uppercnd meshing with a beveled gear le secured to the upper end oi a threaded rod dii disposed at a slight angle to the spindle li in a slideway iii for an adjustable block fill threaded on the rod iii by means of which the strolre ofl buur-cated end or a suman rod to having its` other end pivoted to a reciprocating saw carringe Si.

@ne end of the motor shaft is connected, to a synchro-tie generator i3d and awardly therefrommadapted to engage set bolts it and ld, threaded 1n the lower portion of the rectangular frame 55 and an outwardly' extend-l ing bracket l5.

In order to tilt the saw for the pipe cutting operation a pair of hanger linlrs le-are pivoted as at l'l-to the upper rear portion oi the tilting irame 62 and extend downwardly therefrom and are pivoted near their lower ends as at ld to a connecting frame le pivoted at its opposite end as at 8 to the vertical sides of the rectangular frame 55. The lower ends of the hanger link le are connected by welding or the like to the ends of a Z-bar di to which is attached the saw tilting cam 62 adapted' to engage a cam roller @d which f is actuated in the iollowing manner. The' two stationary end frame members il@ near their lower inner surfaces are connected together by means oi a pair oi spaced channels dd having a door plate de thereon upon which is mounted albraclret de for supporting a solenoid ill having its magnet till pivotcd at il@ to the end oi one arm of a bell cranlr` lever which is pivoted centrally by means oi a pin iii to ears d2 entend# ingl fromv the solenoid casing and bracket de. The lower end of the bell crans. lever Si@ is pivoted to a block dVwhich is secured on a shalt @il adapted to operate a swinging iframe de for sup porting the cam roller @il having a' shaft de .iournaled in bearings @l mounted thereon. This swinging frame @il comprises a pair of channels @t disposed in spaced relation with their webs vertically and their iianges extending outwardly and connected together at one end by means oi a hinge lug @d pivot'ed by means oi a pin it@ to an eye -bolt lidi pivotally secured to a bearing block im and attached to one of the channels 84 and the oor plate 85. The opposite end of the 4 channels 98 of the swingingirame Sli are connected together by means of an angular member iil'i having one leg extending outwardly to form a track for engaging a' pair oi rollers it lournaled as at ille in the head of a spring pressed l plunger ill mounted in a bearing block il se cured at' an intermediate point to the channel de and the door plate it. @ne end oi the shaft cam roller 83 does not engage the cam 82 but isheld by the spring ||8 in the position indicated in Figs. 9, 10 and 12.

In cutting the pipe the parts are so timed that the eam roller 83 will be adjacent to the low portion of the cam 82 when the solenoid 81 is energized. When this occurs the swinging frame 95 will swing the cam roller 83 into the position indicated in dotted lines in Fig. 12. As the saw carriagecontinues its stroke the cam roller 83 will ride up over the cam 82 thereby tilting the trame 52 and saw B1 into the position indicated in Fig. '1 and severing the pipe ||3 in the pass or through I |4 which has been advanced from the last set of rolls ||5 driven by the mill motor having a connection II6 with a synchro-tie generator I I1.

A com bined spring balance and dash pot ||8 lhas the lower end of its piston rod pivoted as at ||9 to oppositeA sides of the tilting frame 82. When' the frame and saw 61 are tilted downwardly the pistons |28 compress the springs I2I. After the cutting operation the springs |2| raise the frame 62 and saw 81, and in order to retard the return movement of each of the pistons |28 a dash pot is provided as at |22. The two combined spring balances and dash pots ||8 are connected together at an intermediate point by means of a web |23 having eyes at each end for receiving the spring balances andV dash pots ||8 which are provided at each end with a pivoted projection |24 adapted to extend into holes in the outer ends o! the horizontal arms |25 of a pair of bell crank levers |26. Each bell crank lever |26 is provided with a tubular hub portionV |21 rotatably mounted on a shaft |28 which is pivoted in ears |29 secured to the top of the rectangular'frame 55. The bell crank levers |26 arresta have downwardly extending arms |38 connected together by a web plate I3| and a threaded nut |32 having trunnion projections |33 extending into holes in the lower ends of the arms |38. A bearing plate |34 is attached to the rear side of the upper portion of the rectangular frame 55, in the lower end of which is rotatably mounted a bolt |35 threaded as at |36 to engage the nut I 32 by means of which the angle of the tilting frame 62 may be adjusted. i

The saw 61 is driven continuously at high speed by the motor 68. As the pipe ||3 is at substantially a welding temperature when cut, it is` necessary to keep the saw cool, and to accomplish this a jet of cooling fluid such as Water or the like is sprayed on one or both sides of the saw as indicated at |31 in Fig. 17. The cooling iluid sprayed on the saw is discharged onto the pipe II3 during the reciprocation of the saw carriage thereby cooling the pipe and producing dark rings |38 thereon, the number of which will correspond to the number of reciprocations of the saw carriage before the cut is made. As an example, assuming that the pipe is being cut into twenty rfoot lengths with the pipe advancing slightly less than seven feet for each reciprocation of the saw carriage, the length of pipe will have three dark rings and the cut will be made 0n the third forward stroke/through the third dark -ring portion. Heretoiore the cut has been made through the pipe while hot and having a uniform temperature thereby deiorming the ends of the pipe and producing rough edges as indi;- cated at 88 in Figs. 2liY and. 2L which had to be out off or straightened.

In partially cooling the pipe at the point where it is to be severed and then cutting it through the dark ring |38 a clean cut is produced as indicated at |48 in Figs. 18 and 19. A few seconds after the pipe has been cut these dark rings disappear owing to the heat of the adjacent portions oflthe pipe and the pipe will then be of uniform co or.

In our invention we have shown mechanism -for operating a saw which is moved transversely as well as longitudinally while the pipe or other materia; is being cut, so that the saw is moved in timed relation with the longitudinal movement ofthe continuously advancing pipeduring the cycle of the cutting operation.

The speed of the driving means is controlled to suit the speed of the pipe through synchrotie generators and motors. As the speed and stroke of the saw carriage will vary with the adjustment of the pivotal end of the pitman rod 58 on the rocking lever 39, and the connecting rod 53 having a relative fixed pivotal connection at 52 m relation to the rocking arm 39 with the other end of said rod pivoted to the cam I8 and adapted to travel in a concentric path would also produce a variable stroke, it is necessary to compensate for this variation during the cutting operation.

In Figs. 1 and2 we have shown a cam |8 engaging a cam roller 28 adapted to transmit motion to the reciprocating saw carriage 5| for accomplishing this purpose. This cam I9 which has a portion of its cam roller engaging surface reduced in height is secured to one end of the shaft |8 for the gear Wheel 6 mounted in the pivoted casing This cam I9 is adapted to be held at all times in contact with the cam roller 28 by means of the spring I1 and is so adjusted and timed .that the cut will be made during the interval that the cam roller 28 engages this reduced height area of the cam.

The cam I8 and control segments 22, 23 and 24 of the limit switch 25 rotate one revolution for each reciprocation of the saw carriage 5| and the control i'or the sequence' operation which will determine the number of revolutions of the cam per cut is indicated in Fig. 14. This diagram shows an arrangement that will accommodate any spacing from one revolution to seven revolutions of the cam land control segments per out. Referring now to Fig. 14 and assuming that the contact arm forthe cut selector is set on No. 3 position and the coils for the relays are deenergized and in the position as indicated in the diagram, when control segment 22 makes contact with the lingers |4| it closes relays |42, |43, |44

and |45. A holding circuit is established through the coils |45 and |41 but current does not iiow through the same until 22 breaks contact, at which time coils |46 and |41 are energized, opening contacts |48 and |49 and closing contact |58.

When control segment 22 makes contact with the contact fingers |4| on the second revolution, relays |5|, |52 and |53 are closed with a holding circuit established through the coils |54 and |55 but current does not dow until control lsegment 22 breaks contact at which time |54 and |55 are energized thereby opening contacts .|56 and |51 and closing contact |58. Coils |48 and |41 are de-` interlocking land disconnecting circuit for the test piece circuit is functioning. After the closing oi |82 and the resulting closing and interlocking c1182 and |83 and -when contact segment 22 engages the contact ngers |4I, a circuit will be established from the bus bar line through segment 22, contacts' |10, |56, |48, |88, coils of |84 and |85, contact |82 to bus bar line. This will open |85 and close |84. `At the same instant 22 holding circuit. This closing of relays l|62 and |68 opens relays |5|, |52, |58, |58, |60 and |6|, thus resetting the control relays. Control segment 28 then breaks contact to open relays |62 and |68 and close relays |64 and |66 after the cut is made.

Assuming that the cut selector had been set for No. 6, when control segment 28 makes contact with the fingers |4| on the third revolution, relays |59, |60 and |6| are closed and establishes its holding circuit through coils |j8`| and |68. When contact segmenty 22 breaks contact |66 closes and |110 and |1| are opened, and the holding circuit for |5|, |52, |56, |58 and |66 is opened.

On the fourth revolution when control segment 22 makes contact with the 'lingers it closes relays |72, |18 and |741. One side of the circuit is made through contacts |68 and |68 and through |72, |113 and |118 coils to bus bar line, and the holding circuit from the bus .bar line through relay contacts |65 andidii coils |66 and |68 contactor |`|2 coils iid, |73 and ||f3 to the bus bar line, When coils |86 and |i`| are energized contact |68 is opened through the interruption of the holding circuit for |58, |68 and |6 On the fth revolution when contact segment 22 makes contact with the fingers, it closes relays v |16, |16 and ||1L One sider of the circuit is made through contacts |70, |66, |66 and ||8,-coils N15, |16 and to bus bar line, andthe holding circuit through contacts |65, |i|, coils |58, |65 contact H5 and coils for |'||i, iid and to bus bar line. When coils |56 and |56 are energized contacts |56 and |61] are opened and contact |66 is closed4 and interrupts the holding circuit for |'|2||d and |li.-

@n the sixth revolution when contact segment 82 makes contact `with the fingers it closes relays |7l8, H6 and |66 and immediately closes relays |62 and |63 which control vthe saw solenoid 6l and open contacts |66 and |66 relays. Relays 62 and |68 remain closed through the interlocking action of the holding circuit and contact segstay closed through the action oi the holding circuit as established by relay |02. If thisoccurs during the first revolution of a sequence when relays I42, |48, |44 and |45 are closed, relays |82 and |68 will be Vclosed by a circuit established from the bus bar line through contacts |82, |45 and |44,'coils |68, |62, |65 and |66 to the bus bar line. This will actuate the saw lcut solenoid 81 as described previously.

At the same time that this is occurring, the

closes the contact segment 24 will engage the iingers |86 and close a circuit shorting contact |85.

As a result the holding circuit of |82 and |83 will be maintained until switch 24 is opened. At

' this same time coil |84 establishes a holding circuit Ior itself and |85 through its own contact.

When contacts |62 and |68 are closed contacts |64l and |65 will be opened deenergizing coils |44 and |45. However, contacts |64, |65, |62 and |68 will be interlocked by contact segment 23A |88 and |85 will be broken and |85 will close and |88 will open, thus restoring the test piece circuit to normal In case push button |8| is closed after the iirst revolution, the seiiuen'ce will continue to completion, and on the next revolution when contact segment 22 engages contact ngers Ml, `a. test piece will be cut as previously described.

Relays |8'l and |88 are also provided for a seventh revolution per cut.

With this manner of control after the saw has made its cut all the coils for the relays will be deenergized and the desired sequence can then be repeated.

Referring now to Fig. l5 which is a view showing diagrammatically the electrical circuits for controlling the operation of the drive for the i-lying saw, the positive and negative bus bars are indicated -by the numerals |88 and |80, respectively, the mill motor, 2 the motor for adjusting the stroke of the rocking lever and 3 the motor for reciprocating the saw carriage, each of which is provided with a circuit |6|, |62 and |83, respectively, extending to the bus bars |88 and |86. The mill motor is connected by means o a. belt ||6 or the like to a synchro-tie generator which is adapted to drive through the circuit connection |96 a synchro-tie motor |86 which has a shaft for actuating a mechanical dierential |96 provided with a regulator |91 to adjust the speed of the driving motor d and a cone pulley |80 which is connected by means of a belt |96 to the cone pulley 26|, having a shaft 20| rotated by means of a synchro-tie motor 202 having a circuit connection 263 extending to the synchro-tie generator 80 for the motor d. For adjusting the speed of the driving motor 3 to compensate for various saw radii the belt |68 connecting the cone pulleys |68 and 280 is provided with a threaded belt shift which is adjusted by means of a threaded rod 205 adapted to be rotated -by means of a synchro- 'tie motor 206, having a circuit 201 extending to a synchro-tie motor 208. `'Ihese two synchro-tie motors 206 and 208 receive their power from the synchro-tie. generator 84 driven by the motor 2 for adjusting the stroke oi the rocking lever, through the circuit 208. In order to provide for a vernier adjustment of the cone pulleys |98 and: 200 and the saw stroke, the synchro-tie motor 208 has its shalt 2l0 connected by means ci a 9 train of gearing 2li with the shaft of the motor 2 It having a circuit connection M3 extending to the bus bars its and i90. Said motor 212 is also provided with a brake 2id for controlling the same. u

I'he motor 3 for reciprocating the saw carriage has its shaft provided at one end with a D. C. magneto generator 23 having a circuit connection 27 extending to a volt meter 28 properly 'calibrated for indicating the gear motor speed.

v.3l which may be used in addition to the meter 28 for indicating the speed of the driving motor 3 at this point.

Mounted on the reduction gear housing 4 is a limit switch 25 having the contact segments 22, 23 and 24 therein for engaging the contact fingers lll,V IE6 and 186 for the saw cut control circuits.

` The synchro-tie generator `34 has a circuit connection 2| 5 extending to a synchro-tie motor 2i6 provided with la shaft 2l? having a beveled gear 2|8 mounted thereon meshing with a beveled gear 2|9 which engages a dial 3B adapted to indicate the pipe lengths being cut. Y

' The motor 2 for adjusting the stroke of the rocking lever and the synchro-tie generator 34 1 are connected togetherby means of a shaft 220 by which is driven by means as at 22| a. limit switch 35 for controlling the dial indicator, the

operation oi. which will be more clearly understood by referring to the diagram shown in Fig.

22. In this diagram illustrated in Fig. 22 there through a synchro-tie connection to the lever stroke adjusting motor 2 comprising shaft 220 synchro-tie generator 34, circuit connection 2| 5, synchro-tie motor 216, and shaft 2H provided with a beveled gear 2I3 meshing with a beveled gear 2l9r which engages the periphery of the dial 36.

Pivoted centrally on the dial 36 is a contact arm 223 having a pointer 22d which can be movedv to any predetermined value desired upon the scale 222, depending upon the length of the pipe to be cut, by means of an adjusting knob 225. With this device the operator while rolling a schedule of pipe of a given length will determine the next length of pipe to be cut and will move the contact arm 223 to a value on the scale 222 that will correspond to the arc through .which the rocking lever arm will travel. To illustrate this, assume that the operator by means of the adjusting knob 225 moves the contact arm 223 tothe right which would permit cutting a longer length of pipe than is being cut at the time this change is being made. Nothing will happen until rthe double `throw switch 22B which is marked manual at the top and automatic at the bottom Vis thrown to the bottom. When this is done the left-hand blade of the switch '22B shown in Fig. 22 will be active and will close the circuit to the operating coils -221 and 228 marked long y, in the diagram. The circuit will be from the left-hand bus bar through coils 221 and -228 Y marked long and then bach' to the revolving segment 229 contact arm 223, middle Sill@ o? knob 225 of dial' 3@ and then baci.: to the opposite side of the control bus bar. This will start motor 2 in the direction to increase the length or radius of the rocking lever arm and by means ci the 'synchro-tie equipment the dial will rotate until its automatic position corresponds to the preset position of the contact arm 223 at which time the motor 2 will stop.

If the operator desires tocut a shorter length of pipe he moves the contact arm 223 to the left which will permit cutting a shorter length oi pipe than isbeing cut at the time this change is being made. When the switch 22d is thrown into the automatic position the right-hand blade of said switch will be active and will close the circuit to the operating coils 23d and 235 marked short. The circuit will then be from the left- "short and then back to the revolving segment 2'32, contact arm 223 middle stud or knob 225 of dial 3.6, and then back to the right-hand bus bar. This will start motor 2 in the reverse direction to that above described and will decrease the length or radius of the rocking lever and by means 'of the synchro-tie equipment the dial 3S will rotate until its 01T position corresponds to the preset position oi the contact arm 223 at which time the'motor 2 will stop. 'r

'If for any reason it is desirable to inch the motor 2 .to change the radius of travel yof the rocking lever arm, the switch 223 can be moved to the upper position marked manual after lwhich motor 2 can be moved in one direction or the other depending upon which way. the vertical handle 233 of the master switch 23d is moved. It will be noted that on the leftuhandfside the master switch 234 is marked long and onthe right-hand side short The switch 223 is a standard double-pole type of control switch and y is adapted for the operator to hold it in position until the desired movement is completed and then return it to the on position.

reverse direction to come back to position.

In Fig. 16 we have shown a device that will indicate the travel of the pipe in ieet per minute, and a corresponding instrument that will be calibrated on a similar scale that is operated by a magnet generator on the motor that rotates the rocking lever arm. This consists of a pinch i roll 235 which contacts with the traveling pipe H3 which drives a D. C. magneto generator 236 to which is connected a volt-meter calibrated in feet per minute. A similar instrument is connected to the magneto generator driven by the motor 3.

Having thus given the foregoing general and v detailed description of our invention, we will now further describe the operation oi the same: Assuming that the cut selector is set on lilo. 3 position as indicated in Fig. i4, the pipe after leaving the welding and sizing rolls is advanced through'the channel or trough iid adjacent to the continuously reciprocating saw carriage 5l,

which is provided with rollers 59 and Si! for en-L e vgaging tracks 58 and 6| secured to the stationary end frames 56 for guiding and supporting vthe saw carriage.

The saw carriage is recprocated by means ci a motor 3, through pinion 5 and gear 6 having a shaft I0 which has one end connected by. means of a universal coupling 2|v to a limit switch 25l hand bus bar through coils 23B and 23H marked Ii there is any over-travel the said twine-pole* switch 22 will cause the motor t to start in the having segment contacts v22, 23 and 24 mounted therein for controlling the saw cut, while the opposite end oi' said shaft Ill has a cam I9 for engaging a cam roller 20. A connecting rod il has one end pivoted to the cam i9 Aby means of a crank pin 54 while the other end is pivoted to the rocking lever 3 9 by `a relatively iixedI bolt I2. A pitman IBl has one end pivoted'to the reciprocating saw carriage 5l, while the other end riage to change somewhat the speed of its travel,

and owing to the fact that the pivotal pointl at 48 on the rocking lever for the pitman 50 will have a greater movement than the pivoted'ends o! the connecting rod B3 .the saw carriage will travel at a slightly greater speed than'the pipe. ln order to allow for this variation so that the speed of travel of the saw carriage willbe the same as the move/ment of the pipe the gear shaft iii is provided with a cam it for engaging a cam roller 20. As indicated in Fig. 2 the cam is and the cam roller are in the position they will assume during the cutting operation. lt will be noted that the pivotal connection for the rod t3 on the cam will travel in the arc of a circle during the cutting operation which will produce a variable speed, and to compensate for this the cam is provided with a peripheral portion which is reduced in height or flattened and the cam is also adapted to swing laterally, as its shaft i@ is journaled in the pitoted lcasing il and held in contact with the cam roller at all times by means of spring il'. lin this manner the speed oi the saw carriage is slightly reduced and a uniform speed with the pipe is produced.

At the end oi' the third revolution of the cam UQ the limit switch 2t will close the circuit to en ergize the solenoid ill thereby swinging the trame @El with the c m roller @Si mounted thereon into thepath o? tI e saw tilting cam d2 thereby tilting the `freine @il and saw @l carried thereby to moire the cut. After which the tilting trame and saw are returned to the normal position hy means of the combined spring balances and dash pots claim as new and desire to secure ley lLetters Pat Aent is:

i. .A machine for severing continuously moving l material into lengths, comprising a carriage,

means for reciprocating the carriage, a trame pivotally mounted on the carriage, means mounted on the pivoted frame for cutting the material, means for normally retaining the cut ting means out of cutting engagement with the material during the reciprocation of the carriage, electrically controlled means for tilting theplvoted-'frame and cutting means laterally to cut the material into predetermined lengths during a reciprocation of the carriage, and preset means electrically 'actuated for automatically controllingthe' lengths oi material, cut.

2. A machine for severing continuously mov ing material into lengths, comprising a stationary .anden l 12 trame, a reciprocating carriage mounted thereon, aframe pivoted to the reciprocating carri'age. a saw continuously driven mounted on the pivoted frame for cutting the continuously moving material, means for retaining the saw outof cutting engagement with the material during the reciprocation of the carriage. and means automatically controlled for tilting the pivoted frame to cut the material into predetermined lengths during a reciprocation of the carriage.

3. A machine for severing continuously moving pipe or the like, comprising a stationary frame, a carriage mounted on the stationary frame, means for reciprocating the carriage, a frame l5 pivotally mounted in the reciprocating carriage, cutting means continuously driven mounted on the pivoted frame, means for normally retaining Vthe cutting means out of cutting engagementlwith the pipe during the reciprocauon of the carriage, electrically controlled means for tilting the pivoted frame to cut the pipe into predetermined lengths during a reciprocation of the carriage, and resilient means for returning the tilted frame to its normal position after the cutting operation.

electrically controlled for tilting the pivoted Y frame and saw laterally into cutting engagement with the pipe during a reciprocationJ oi the car riage, and resilient means tor returning the tilted frame to its normal position.

5. A machine tor severing a continuously moving pipe or the like into predetermined lengths. comprising a stationary frame, a carriage mounted to reciprocate in the stationary frame, actu ating means for reciprocating the carriage, means for adjusting the strolre oil the carriage, a frame pivoted to the carriage, a saw mounted on the pivoted frame, means mounted on the pivoted frame tor continuously rotating the saw, means for retaining the saw out oi cutting ensagement with the pipe during a, reciprocation 5@ of the carriage, means electrically controlled by thev actuating means for the carriage for tilting said pivoted trame and saw laterally into cutting engagement with the pipe, and means for returning the pivoted frame and saw to their 5o normal positions.

. 6. l machine for severing continuously moving pipe or the like, comprising e. pair of spaced stationary side frame members, tracks connecting the upper and lower portions oi the station? to ary side frameV members, a rectangular frame having wheels attached thereto for engaging the tracks, means for reciprocating the rectangular frame. a; frame pivoted to the opposite ends of the rectangular `frame, a saw mounted on the pivoted frame, means mounted on the pivoted frame for. continuously rotating the saw, a cam pivotally attached to the pivoted frame, a cam roller adapted to engage the cam to tilt the pivoted frame and saw mounted thereon into cutting engagement with the pipe, and automatic means for controlling the length or pipe cut.

/ '1. A machine for severing 'continuously moving pipe orl the like,l comprising astationary frame, a carriage mounted inthe stationary trame, means for reciprocating thezcarriage. a

4. A machine for severing a continuously mov- *I wwwframe pivotally mounted in the carriage, a saw mounted on the pivoted frame, a motor mounted on the pivoted frame for continuously rotating the saw, means for automatically controlling the stroke of the reciprocating. carriage, means for normally retaining the saw out of cutting engagement with the pipe during the reciprocation of the carriage, electrically operated means for tilting the pivoted frame and the saw into cutting engagement with the pipe, and resilient means for returning the pivoted frame to its normal position after the cutting operation.

8. A machine for severing continuously moving pipe or the like, comprising a carriage, a frame pivotally mounted on'the carriage, a saw mounted on the pivoted frame, means for re.

ciprocating the carriage, means for indicating the relative speeds of thecarriage and the moving pipe, means for synchronizing the speed of the carriage with the moving pipe, means for retaining the saw out of cutting engagement with the pipe during reciprocations of the carriage, electrically operated means for tilting the pivoted frame to project the saw into cutting engagenient with the pipe, and means for returning the pivoted frame and saw to their normal position.

9. A machine for severing continuously moving pipe or the like, comprising a stationary frame, tracks supported by the stationary frame,

a carriage having wheels engaging the tracks, means for reciprocating the carriage on the tracks, a frame pivotally mounted on the carriage, a saw mounted on the pivoted frame, means for adjusting the speed of the carriage, means for synchronizing the speed of the carriage with the moving pipe, means for retaining the saw out of cutting engagement with the pipe during a reciprocation ci the carriage, selective means electrically operated for tilting the pivoted frame to project the saw into cutting engagement with the pipe, and resilient means for returning the pivoted frame and saw to their normal position. f

10. A machine for severing continuously moving pipe or the like, comprising a stationary /frame, tracks supported by the stationary frame, a carriage havingwheels engaging the tracks, means for reciprocating the carriage. on the tracks, a frame pivotally mounted on the carriage, a ksaw mounted on the pivoted frame, means mounted on the pivoted frame for conduring one of the reciprocations of the carriage.

,having Wheels engaging the tracks, means for reciprocating the carriage, a frame pivotally mounted on the carriage, a saw mounted on the pivoted frame, means for continuously rotating the saw mounted on the pivoted frame, means for adjusting thestroke of the reciprocating carriage, means for automatically controlling the length of pipe cut, means for normally retaining the cutting means out of cutting engagement with the pipe during the reciprocation of the carriage, means for tilting the pivoted frame laterally to swing the saw into cutting engagement with the pipe during a reciprocation of the carriage, and means for synchronizing the movement of the reciprocating carriage with the pipe during the cutting operation.

13. A machine for severing continuously moving pipe or the like, comprising a carriage', means tinuously rotating the saw, a cam pivotally'connected to the reciprocating carriage and pivoted frame, a cam roller laterally movable in relation to the cam,.electrically actuating means for projecting the cam roller into the path of the cam to tilt the pivoted frame to swing the vsaw` into cutting engagement with the pipe, resilient means for retracting the cam roller from the path of the cam,and means for returning the pivoted frame and saw to their normal po.

for continuously reciprocating the carriage, cutting means mounted on the carriage, means for adjusting the stroke of the carriage, means electrically actuated for automatically controlling the lengths of the pipe to be cut during the reciprocation of the carriage, means for normally retaining the cutting means out of cutting engagement with the pipe during the reciprocation of the carriage, preset means electrically controlled for tilting the cutting means-laterally to cut the pipe into predetermined lengths during the iirst or after a plurality o1' `reclprocations of engagement with the pipe during the reciprocation ofthe carriage, a rocking lever mounted adjacent to the carriage, a pitman having its ends pivoted to the carriage and the rocking lever, means for adjusting the pivoted end of the pitman on the rocking lever to vary the stroke of the reciprocating carriage, a rod connecting the driving kmeans with the rocking lever, means for 4 varying the stroke between the driving means and the rocking lever, and means for tilting the saw into cutting engagement with the pipe during a reciprocation o1' the carriage.

15. A machine for serving continuously mov- -ing pipe or the like, comprising a stationary frame, Atracks secured thereto, a carriage having wheels engaging the` tracks, driving means` for reciprocating the carriage, 'a saw mounted on the carriage, a rocking lever mounted adjacent to the carriage, a connection between the carriage and the rocking lever, means for adjusting the connection lbetween the carriage. and the rocking lever to vary the stroke of the carriage. a connection io/etvreen the driving means and the rocking lever, means for varying the stroke between the driving means and the rocking iever;

means for normally retaining the saw out ci cutting engagement with the pipeduring the, reciprccaticn ci the carriage, and means fior tilting the saw into cutting4 engagement with the pipe .during a reciprocation of the carriage.

controlled for governing the number of recipro I cations of the saw carriage before the cutting operation, means for synchronizing the movement of the pipe with the carriage during the cutting operation, and means electrically actuated for automatically controlling the lengths of pipe cut.v

1'?. A machine for severing continuously moving pipe or the like; comprising a stationary supporting frame, a carriage mounted on said supporting frame, a frame pivotally mounted on the carriage, a continuously rotating saw mounted on the pivoted frame, means for reciprocating the carriage, means for normally retaining the saw out of cutting engagement with the pipe during the reciprocation of the carriage, means for tilting the saw into cutting engagement with the pipe during a reciprocation of the carriage, and

porting frame. tracks mounted on the supporting f frame, a carriage mounted on said supporting frame, means for reciprocating the carriage, a frame pivotally mounted on the carriage, a saw mounted on the pivoted frame, means for continuously rotating the saw mounted on the pivoted frame, a, cam pivotally attached to the carriage and the pivoted frame and movable therewith, a cam roller normally disposed-adjacent to the path of the cam, automatic means for projecting the cam roller into alignment with the path of the cam during the reciprocation of the carriage to tilt the saw into cutting engagement with the pipe, and means for retracting the cam roller from the path of the cam after the cutting operation. n

19. A machine for severing continuously moving pipe or the like. comprising a' stationary frame, a carriage mounted on the stationary frame. means for continuously reciprocating the carriage, a frame pivotally mounted in the carriage, a continuously rotating saw mounted `on the pivoted frame, lmeans vfor normallyretaining the saw out of cutting engagement with the pipe l during the reciprocation ofthe carriage, means f orsuccessively tilting .the saw into cutting. engagement with the pipe during a reciprocation of the carriage to produce pipe sections of equal lengths, and means automatically controlled for cutting pipe sections in successively different lengths. i

-the pipe during the reciprocation of the carandata .riage, means for tilting the saw into cutting engagement with the pipe, and automatic means for controlling the length of the pipe to be cut. 21. A machine for severing continuously moving pipe or the like, comprising a carriage movable longitudinally of the pipe to be severed, driving means for continuously reciprocating the car- -ri`age, a rotatable saw mounted on the carriage,

means for retaining the saw out of cutting engagement with the pipe during a reciprocation of the carriage, automatici means for moving the saw into cutting engagementv with the pipe, and autovmatic means actuated by the driving means for the carriage for controlling the length of the pipe to be cut.

22. A machine for severing continuously moving pipe or the like, comprising a carriage mov- -I able longitudinally of the pipe to be severed, actuating meansl for continuously reciprocating the carriage, a rotatable saw mounted on the carriage, means for retaining the saw out of cutting engagement with the pipe during a plurality of reciprocations of the carriage, automatic means for moving the saw into cutting engagement with the pipe, means for synchronizing the movement, of the carriage with the 4pipe during the cutting operation, and means for indicating the length of pipe cut. Y

23. A machine forsevering continuously moving pipe or the like, comprising a carriage movable longitudinally of the pipe to be severed,

actuating means for reciprocating the carriage,

a rotatable saw mounted on the'carriage, means for normally retaining the saw out of cutting engagement with the pipe during the reciprocation of the carriage, automatic means for moving the saw into cutting engagement with the pipe for each reciprocation of the carriage, means for indicating the lengths of pipe cut, a regulator for adjusting the speed of the actuating means for the carriage, and means for adjusting the speed of the carriage to compensate for various saw radii.

24. A machine for severing continuously moving pipe dr the like, comprising a stationary frame,

a carriage adapted for reciprocation on said stationary frame, a saw mounted on the carriage, means for normally retaining the saw out oi' cutting engagement with the pipe during the reciprocation of the carriage, preset means for automatically moving the saw into cutting engagement with the pipe during a reciprocation of the carriage, amotor having a connection with driving gearing for reciprocating the carriage, a rocking lever mounted between the driving gearing and the carriage, a connecting rod betweenthe driving gearing and the rocking lever, arpitman rod connecting the carriage with the rocking lever, a screw-threaded rod journaled inthe rocking lever, a block screw-threaded to engage the screw-threaded rod, ya pivoted connection between one end of the pitman rod and the adjustable block, and means for rotating the screw-threaded rod to adjust the block to change the stroke of the carriage.

y 25. A machine for severing continuously moving pipe or the like comprising a stationary frame, a carriage mounted on' the stationary frame, means for continuously reciprocating the carriage. a frame pivotally mounted in the reciprocating carriage. a saw continuously driven mounted on the pivoted frame. preset electrically controlled means for tilting the pivoted frame to cutrthe pipe into lengths in succession during the reciprocation of the carriage, a spring bal- 

